V2X Packet Buffer Management via Priority-Based Discarding
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing packets for Vehicle-to-Everything (V2X) communication, particularly in determining when to discard packets to optimize buffer management and ensure timely transmission.
Innovation Solution
A method and apparatus for a user equipment (UE) in a wireless communication system that stores packets from an upper layer, determines if the number of packets in the buffer exceeds a threshold value, and discards packets when the threshold is reached, considering packet priority and zone changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packets are stored in buffer for V2X communication, then transmission reliability is improved, but buffer memory consumption increases and transmission latency increases
Solution Approach 1:
The patent changes the parameter of buffer management by introducing dynamic threshold values based on packet priority and zone information. High-priority packets have lower discard thresholds while low-priority packets have higher thresholds, allowing the system to maintain reliability for critical packets while limiting overall buffer consumption.
Solution Approach 2:
The patent applies different buffer management strategies to different packet types based on their priority levels and zone characteristics. Each packet is treated locally according to its specific requirements rather than applying a uniform buffer management policy, enabling optimized memory usage while maintaining necessary reliability.
2Reliability
If packets are stored in buffer for V2X communication, then transmission reliability is improved, but transmission latency increases
Solution Approach 1:
The patent implements dynamic buffer management where the discard threshold is not fixed but changes based on packet priority and zone information. This dynamic approach allows the system to adaptively balance between maintaining packets for reliability and discarding them to reduce latency, particularly for time-sensitive V2X communications.
Solution Approach 2:
The patent enables rapid packet processing by skipping the buffer storage step for low-priority packets or packets that exceed the dynamic threshold. This allows critical packets to be transmitted immediately while less important packets are filtered out, reducing overall transmission latency.
3Device complexity
If packet buffer management is simplified, then device complexity is reduced, but packet management efficiency deteriorates
Solution Approach 1:
The patent implements a self-service buffer management mechanism where packets automatically evaluate their own priority and zone information to determine whether to be stored or discarded. This eliminates the need for complex centralized control logic while maintaining efficient packet management through decentralized decision-making at the packet level.
Data Source
AI summary
A method for discarding at least one packet by a user equipment (UE) in a wireless communication system is disclosed. The method includes steps of storing the at least one packet received from an upper layer in a buffer; determining whether or not a number of packets in the buffer is equal to or greater than a threshold value; and discarding the at least one packet from the buffer when the number of packets in the buffer is equal to or greater than the threshold value.